This motif has been called the Meprin And TRAF-Homology (MATH) domain. This domain is hugely expanded in the nematode C. elegans [3].

1: TRAF proteins and meprins share a conserved domain. Uren AG, Vaux DL; Trends Biochem Sci 1996;21:244-245. PMID:8755243

2: Crystallographic analysis of CD40 recognition and signaling by human TRAF2. McWhirter SM, Pullen SS, Holton JM, Crute JJ, Kehry MR, Alber T; Proc Natl Acad Sci U S A 1999;96:8408-8413. PMID:10411888

3: Comparison of the complete protein sets of worm and yeast: orthology and divergence. Chervitz SA, Aravind L, Sherlock G, Ball CA, Koonin EV, Dwight SS, Harris MA, Dolinski K, Mohr S, Smith T, Weng S, Cherry JM, Botstein D; Science 1998;282:2022-2028. PMID:9851918